RouterOS WebFig Unauth File-Read via /jsproxy Stale Pointer (6.49.21+)
CVE-2026-67281 Published on September 5, 2026
Unauthenticated file read in Mikrotik RouterOS
RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file-serving path dereferences this pointer with sufficient rights, then supply parent-directory components in an encrypted URI to escape the WebFig file namespace and disclose root-owned files, including configuration stores containing credentials.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)
Vulnerability Analysis
CVE-2026-67281 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Types
Access of Uninitialized Pointer
The program accesses or uses a pointer that has not been initialized.
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-67281 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-67281
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Affected Versions
Mikrotik RouterOS:- Version 7.24 and below 7.24.2 is affected.
- Version 7.20 and below 7.23.4 is affected.